Research Of AMF And Mixed Cropping System In Gangue Revegetation

In China, the current revegetation of traditional coal gangue hill is moving near surface soil, then cover the surface of the waste dump and re-planting of vegetation.In this study, gravel-like soil mixed with coal as a green substrate, in this mixed medium build grass/legume mixed cropping system and arbuscular mycorrhizal fungi inoculation, to overcome the coal gangue hill vegetation restoration of vegetation Nutrient content and low organic matter content, soil structure and poor plant growth due to poor condition, had no significant effect of vegetation restoration and other issues.This study, two kinds of coal Revegetation Pioneer herbaceous Testucaarundinacea (gramineae) and Medicago sativa L.(legume), pot experiment, simulated in the soil and gravel-like gangue ratio of 1:1 and 1:2 two matrix, the ways of mixed cropping system (solid barrier, mesh barrier, no barrie, for a total of 3), whether AMF (inoculated, not inoculated,2), a total of 12 treatment combinations of plantstest, by measuring the indicators related to plants, substrate index, and the single factor analysis of variance and correlation analysis, reveals the ways of mixed cropping system, inoculation of AMF on revegetation effects of coal.The results showed that:(1) Solid barrier, mesh barrier, no barrie, compared three treatment levels, the two plants mixed mycorrhizal fungi increased root colonization rate, and promoted plant growth, and promote the Testucaarundinacea plants on the absorption of N elements, so that the two production plants has obvious advantages; two plants also enhanced the mixed matrix of the whole plant N content, organic matter content and Medicago sativa L. P content matrix of available K and available content.(2) Mycorrhizal fungi inoculation could significantly promote the growth of two species, and enhance both plant photosynthesis, but plant two plants within the N, P, K nutrient content is not very significant; while mycorrhizal inoculation can improve the two The nutrient content of plant growth substrate, in particular matrix N content and total organic content, but mycorrhizal inoculation on the matrix of available P contents were not significant.(3)Testucaarundinacea coal ratio of 1:1 in the treatment of soil on the growth status of the level of better than 1:2 ratio of soil treatment level of coal, while the Medicago sativa L.is just the opposite. Description Medicago sativa L.tolerance than high fescue more. No matter in the soil matrix on coal ratio of 1:1 or 1:2 ratio of soil matrix of coal, Testucaarundinacea and Medicago sativa L.on growth and nutrient content matrix for the overall performance of no barrie> mesh barrier> solid barrier; Inoculation of arbuscular mycorrhizal fungi> not vaccinated.